The Black Sea is an inland sea between Europe and Asia, it has connected with Mediterranean Sea by Turkey Channel. The Black Sea is the biggest inland sea in the world, because the dark water color, so it called Black Sea. It has area of 436,400km square, a maximum depth of 2212 m, and a volume of 547,000 km cube. The Black Sea’s water has a positive water balance, the water flows into the Black Sea is more than the water evaporation, so the water has less salt. The Black Sea outflow less saline water to Mediterranean and more saline inflow, and because the pollution of industries water and some other dirty water flows into the Black Sea this year and those water on the surface water, the Black Sea looks more and more dark. There are two part of level in the Black Sea. The deep water and surface water, because the landform and the surface water can not have exchange with deep water, and there is no oxygen in the deep water, so Black Sea is also called died sea, because there is no life in the sea, just have some anaerobe lived in the Black Sea.
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